10. Află numărul necunoscut, apoi verifică-te făcând proba: a) a :9= 85
b) 98: d = 19 rest 3
b: 7 = 29 rest 6
(3 x e) + 760 = 898
C:17 = 139 rest 15
(684: f) + 98 x 6 = 759

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?